Combine fails with "null pointer to body given"

[jordan.deanQLV8B]

I have imported a step model of a PCB, I need to combine all of the components then export to an stl for 3d printing.  The problem arises at the combine stage.  I have a board that fails 100% of the time to combine,  prior to this morning, it failed silently (acted like it was combined, but left many components uncombined).  Today it fails every time with the message "null pointer to body given".  I have attached an example .step file, if you import this model, then attempt to combine all of the parts to the board you can recreate the error.

I'm looking for suggestions to push this through, working with these designs is our primary use for Fusion 360.

[paul.clauss · Accepted solution]

Hi @jordan.deanQLV8B

Thanks for posting! The combine tool will only work with bodies, which is likely why you are receiving the error message you described.

To combine all the bodies in your file, you would need to move all the bodies into a single component. This would be a pain, so luckily there is an easier way to export an STL of the entire assembly model. You just need to right click the top level of the design in the browser and select "Save as STL":combine.gif

I hope this helps! Please let me know if you have any questions.

[jordan.deanQLV8B]

Perfect, that's what I needed.